The interplay of secondary Te⋯N, Te⋯O, Te⋯I and I⋯I interactions, Te⋯π contacts and π-stacking in the supramolecular structures of [{2-(4-nitrobenzylideneamino)-5-methyl}phenyl](4-methoxyphenyl)tellurium dihalides

Abstract

The unsymmetrically substituted diorganotellurium dihalides [2-(4,4′-NO 2C 6H 4CHNC 6H 3Me]RTeX 2 (R = 4-MeOC 6H 4, X = Cl, 1a; Br, 1b; I, 1c; R = 4-MeC 6H 4; X = Cl, 2; R = C 6H 5, X = Cl, 3) were prepared in good yields and characterized by solution and solid-state 125Te NMR spectroscopy, IR spectroscopy and X-ray crystallography. In the solid-state, molecular structures of 1a and 1c possess scarcely observed 1,4-type intramolecular Te⋯N secondary interaction. Crystal packing of these compounds show an unusually rich diversity of intermolecular secondary, Te⋯O, Te⋯I and I⋯I interactions, Te⋯π contacts as well as extensive π-stacking of the organic substituents.